Ophthalmic nerve dental surgery
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Ophthalmic nerve dental surgery

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Ophthalmic nerve dental surgery Maxillary nerve Mandibular nerve

Ophthalmic nerve dental surgery Maxillary nerve Mandibular nerve

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Ophthalmic nerve dental surgery Ophthalmic nerve dental surgery Presentation Transcript

  • Ophthalmic Nerve 1
  • Ophthalmic Nerve • • • • First division of the trigeminal nerve. Is a sensory nerve. Smallest of the three divisions of the trigeminal. Arises - upper part of the semi lunar ganglion as a short, flattened band, passes forward along the lateral wall of the cavernous sinus. • Before entering the orbit through superior orbital fissure, it divides into three branches, Lacrimal, Frontal and Nasociliary.
  • LACRIMAL NERVE: • Smallest of the three branches. • Enters orbit through the narrowest part of the superior orbital fissure. • In orbit - runs along the upper border of the lateral Rectus with the lacrimal artery - communicates with the zygomatic branch of the maxillary nerve. • Enters the lacrimal gland - gives off several filaments, which supply the gland and the conjunctiva. • Finally - pierces the orbital septum - ends in the skin of the upper eyelid, joining with filaments of the facial nerve.
  • OPHTHALMIC NERVE BRANCHES A. Infratrochlear B. Anterior Ethmoid C. Posterior Ethmoid D. Lacrimal E. Supraorbital F. Supratrochlear G. Nasociliary
  • FRONTAL NERVE: • Largest branch of ophthalmic. • Enters the orbit - superior orbital fissure and runs forward between the Levator palpebræ superioris and the periosteum. • Midway between the apex and base of the orbit it divides into two branches Supratrochlear Supraorbital
  • SUPRATROCHLEAR NERVE: • Smaller of the two . • Escapes from the orbit between the superior oblique and the supraorbital foramen. • Supplies - skin of the lower part of the forehead close to the middle line and - sends filaments to the conjunctiva and skin of the upper eyelid.
  • SUPRAORBITAL NERVE: • Passes - supraorbital foramen - gives off palpebral filaments to the upper eyelid. • Then ascends upon the forehead and ends in two branches Medial Lateral which supply the integument of the scalp, reaching nearly as far back as the lambdoidal suture. • Both branches supply small twigs to the pericranium.
  • NASOCILIARY NERVE: • Intermediate in size b/w the frontal and lacrimal and is more deeply placed. • Enters - orbit b/w the two heads of the lateral Rectus and between the superior and inferior rami of the oculomotor nerve -to medial wall of the orbital cavity. • Passes through the anterior ethmoidal foramen and enters the cranium. • Supplies - Internal nasal branches - to the mucous membrane of the front part of the septum and lateral wall of the nasal cavity.
  • • Finally emerges as - external nasal branch b/w the lower border of nasal bone and the lateral nasal cartilage - passing down beneath the Nasalis muscle - supplies the skin of the ala and apex of the nose. • Branches of nasociliary Long root of the ciliary ganglion Long ciliary Ethmoidal nerves.
  • LONG ROOT OF CILIARY GANGLION: • Supplies ciliary ganglion. LONG CILIARY NERVE: • Two or three in number • Accompany the short ciliary nerves from the ciliary ganglion pierce the posterior part of the sclera and running forward b/w it and the choroid - distributed to the iris and cornea.
  • INFRATROCHLEAR NERVE: • Given off from nasociliary just before it enters the anterior ethmoidal foramen. • Runs forward along the upper border of the medial Rectus. • Then passes to - medial angle of the eye. • Supplies - skin of the eyelids and side of the nose, - the conjunctiva, - lacrimal sac, and - caruncula lacrimalis.
  • ETHMOIDAL BRANCH: • Supply the ethmoidal cells. • Posterior branch leaves the orbital cavity through the posterior ethmoidal foramen and gives some filaments to the sphenoidal sinus.
  • Functions • Transmits sensory innervations from Eye ball, Skin of upper face, Anterior scalp, Lining of upper part of nasal cavity, air cells. Meninges of anterior cranial fossa. • Conveys parasympathetic fibers to the ciliary and iris muscle for accommodation and pupillary constriction and to the lacrimal gland.